Alexander malm



A. MALM. w Machine for Cutting Paper.v

No. 223,744. Patented Jan. 20, 1880.

Enga. Eug.

N.PETERS. PHOTO-LITHOGRAPRER. WASHINGYON, D` c,

UNITED STATES PATENT i OFFICE..

ALEXANDER MALM, OF BROOKLYN, NEW 'YOBIQ ASSIGNOR TO EDWIN R. SHEBIDANAND THEODORE W. SHERIDAN, OF SAME PLAGE,

MACHINE FOR UTTING PAPER.

SPECIFICATION forming part of Letters Patent No. 223,744, dated January20, 1880. Application filed November 18, 1879.

To all whom t may concern Beit known that I, ALEXANDER MALM, of4

had to the accompanying drawings, in whichi Figure l representsa frontview of a cutter embodying my invention. cross-section of the same inthe line a: x, Fig. l. Fig'. 3 is a horizontal section thereof in theline y y, Fig. l. i

pecially that class of machines in which the resistance offered to theknife lby the paper to be cut reacts upon the clamp.

In the drawings, the letterA designates the machine-frame supporting atable, B, upon which the laminee of paper` or other material rest duringthe cutting operation. O is the clamp, and D the knife, both arrangedabove the table B, the knife being suspended from a cross-head, A', bymeans of oblique links a. The clamp C is joined to a slide, O', by meansof rods b b passing-through the table B, while theknife D is connectedto a slide,D/,by means of alever, E, and rod E', both slides beingguided in vertical ways formed 011 the lower part of the machineframe.The effect of these connections of the clamp and the knife with theirslides C D is that the correct movementsof the clamp and knife areobtained by reverse motions of the slides. To produce these motions oftheslides GD, I make use of a shaft, F, which is situated between theslides, and which carries pinions e f, meshing with racks c d upon theslides.

The shaft Fis fitted in vertical slots g formed in the machine-frame, sothat vit is capable of a compound revolving and up-and-down motion, andwhen the clamp C and knife D are in an upper position the shaft rests inthe lower ends ofthe slots, as shown in Fig. 2.

When a revolving motion is imparted to the shaft F in the directionindicated in Fig. 2 the pinions e f act upon the racks c d, and theclamp-slide C' receives a downward motion, While the knife-slide D movesupward, caus- Fig. 2 is a vertical Similar letters indicatecorresponding parts. My invention relates to machines for cut-j tingpaper and other like materials, and esthe knife.

ing the simultaneous descent of the clamp and the knife. The shaft Fremains at the lower end of the slots g until the` clamp O is brought tobear on the paper to be cut, and the clampslide C ceases its motion,when the pinions e,

meshing with the racks c of `that slide, climb with the resistance ofthe paper, this increasing resistance is added to the tractive action ofthe shaft on the clamp-slide C', so that the resistance offered to theknife reacts upon the clamp, and the pressure of the latter isproportionate to` such resistance.

The lever' E, whereby the knife D is counected to its slide, has itsfulcrum on a pivot, o, which is so arranged that it allows the clamp Cto descend with greater speed than It follows that the clamp C isbrought to bear on the paper before the knife D begins to cut, and thecorrect operation of the machine is insured. The effect of thisaccelerated movement of the clamp G is increased by arranging the latterin advance of the knife.

When the clamp C ceases to move and the pinions e climb up on the racksc, thereby causing the shaft F to rise, as before stated, the upwardmotion of the shaft is added to the revolving motion thereof, in itsaction on the knife-slide D', the effect of which is to increase. thespeed of the knife; and since this occurs just before the knife beginsto cut, the latter forces its way through the paper with an acceleratedmovement. thus gained is a saving of time.

A revolving motion is imparted to the traveling shaft F from adriving-shaft, G, and the motion of the driving-shaft is reversed, ashereinafter described, when the paper has been cut and before the knifeD strikes the table The advantage n IOO B, so that the traveling shaftthen returns to alower position in its slots g, and both the knife D andthe clamp C are caused to ascend. In `the ascent of the knife and clamp, however, the order of their movement is reversed-that is to say, theknife ascends in advance of the clamp until it clears the papel, owingto the fact thatl the shaft F reaches the lower ends of the slots g(during which time it acts on the knife-slide) before it begins to acton the clamp-slide.

To obtain -a reverse motion ofthe shaft F, I have in this exampleemployed the following` mechanism, viz: A clutch, g', feathered upon thedriving-shaftG; two pinions, h h', mounted loosely on the drivin g-shafton opposite sides of the clutch, and both adapted to engage therewith; atransfer-wheel, H, gearing directly with the pinion h, and gearing withthe pinion h through a counter-shaft, t', carrying two cog-wheels, l anda universal joint, I, connecting the transfer-wheel with the travelingshaft. If the clutch g' is thrown in gear with the pinion 7L, the latterforms the medium whereby the motion of the driving-shaft G iscommunicated to the wheel H, which transfers such motion to thetraveling shaft F through the joint I, while, if the clutch is thrown ingear with the pinion hf, the counter-shaft 'L' is the medium of suchcommunication, and it follows that the transfer-wheel obtains a reversemotion.

With the clutch g is combined a lever, J, which connects with a spring,j, on one side of its fulcrum, and engages a cam-wheel, K, by means ofasuitable stud on the other side thereof, this cam-wheel being mountedon the shaft of the transfer-wheel H. yThe function vof the spring j isto throw the clutch g in gear with the pinion h, while that of thecam-wheel K is to retain the lever in the position to which it is movedwhen the clutch is thrown in contact with the other pinion.

What I claim as new, and desire to secure by Letters Patent, is-

l.' The combination, in a paper-cutter, of a revolving shaft adapted tomove or travel at a right angle to its longitudinal axis with theclamp-slide G and knife-slide D', both geared with said shaft by meansof racks and pinions, substantially as and for the purpose described.

2. The combination, with the traveling shaft F, of a driving-shaft andreversing mechanism consisting of the clutch g', two loose pinions, hh', transferwheel H, countershaft fz?, and universal joint I, allconstructed and adapted to operate substantially as described.

3. The combination ofthe clutch-lever J, its spring j, the cam-wheel K,and the knife D with the clutch g', pinions h h,transfer-wheel Hcounter-sh aft t', traveling shaft F, and joint I, all constructed andadapted to operate substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand andseal this 17 th day of November, 1879.

ALEXANDER MALM.

